Re: [PATCH v26 00/10] Implement PSCI reboot mode driver for PSCI resets

[Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>]

On 9/28/2026 11:39 AM, Shivendra Pratap wrote:
> Userspace should be able to initiate device reboots using the various
> PSCI SYSTEM_RESET and SYSTEM_RESET2 types defined by PSCI spec. This
> patch series introduces psci-reboot-mode driver that will induce
> command-based resets to psci driver for executing the device reset.
> 
> The PSCI system reset calls takes two arguments: reset_type and cookie.
> It defines predefined reset types, such as warm and cold reset, and
> vendor-specific reset types which are SoC vendor specific. To support
> these requirements, the reboot-mode framework is enhanced in two key
> ways:
> 1. Support upto three 32 bit magic values as arguments. This enables to
> support for a 32 bit reset_type and a 64 bit cookie).
> 2. Predefined modes: Add support for predefined reboot modes in the
> framework.
> 
> With these enhancements, the patch series enables:
>   - Arch Warm reset and system reset cold as predefined reboot modes.
>   - Vendor-specific resets, configurable via the SoC-specific device tree.
> 
> Together, these changes allow userspace to trigger all above PSCI resets
> from userspace.
> 
> Note on introducing psci aux devices:
> Based on feedback from Bart, Lee and Ufee, PSCI child functionality now
> uses aux devices instead of an MFD driver, with psci-cpuidle-domain and
> psci-reboot-mode probed through a common PSCI aux device enumerator.
> Reference discussions on this:
> https://lore.kernel.org/all/CAPx+jO9Hi2R_UnCEhsXLwf74c3RTb+RodaJ6SOVXbQX_eHt++A@mail.gmail.com/

Hi Lorenzo,

I am planning to send a minor update to remove some unnecessary headers 
from psci-reboot-mode.c. Could you please take a look and share any 
review comments so I can address them in the next version?

thanks,
Shivendra